Fender Blues Junior ~Distortion~

[TerryD]

I'm getting low volume distortion, sometimes ghosting and sometimes just willy nilly.  Any idea what it is?  Where can I get a schematic for this?  They don't have old fashioned picture schematics like Fender used to have, do they?  Could the filter caps be shot on this already??  I tried switching preamp tubes and I didn't luck out.

[phsyconoodler]

You have two power tubes too you know.Sounds like one is shot.Get a new pair in there and see what happens.If that doesn't do it you have other issues.

[stratele52]

SCHEMATIC ; There is a Blues Junior III too .

This one is for Blues Junior;  Check also resistor at V3 Phase inverter tube R12 , R14 and other

http://support.fender.com/schematics/guitar_amplifiers/Blues_Junior_schematic.pdf

[TerryD]

I'll check the power tubes...thanks  and thanks for the schematics.  Terry

[stratele52]

I'll check the power tubes...thanks  and thanks for the schematics.  Terry

New tubes ALWAYS need bias check and ajust if needed.

[Jack1962]

There are 4 versions of the blues junior.

[TerryD]

How do you tell what version one has? Thanks.

[stratele52]

How do you tell what version one has? Thanks.

You have to look a the circuit in the amp , what is the value of parts , resistor OR  if you have any date on your amp with date of version .

But for your problem no need for now to know wich version you have.